Hoist



arch 16 192,6. l v v R. BEAUMONT HOIST Filed Sept. 30, 192].

Patented Msr.- ie, 1926.

Ni'iaD STATES noemer Pi. BEAUMONT, or naDNon, PENNSYLVANIA, COMPANY, Aor PHILADELPHIA, PnNNsYLvANIa,

VANIA.

ASSIGNOR- T0 B. H; BEAUMONT Appueation med september se, 1921. p serai Naseem.

To all whom t may concern.'

' Be it known that I, Roni-:nr H. BEAUMoN', a citizen of the United States, residing-1n Radnor, Delaware County, have invented rtain Improvements in Hoists, of which the following is a specification.

My invention relates to certain improvements in hoists, especially of the tandeml type in which two drums are used, o ne to pay out Aa rope and the other to wind a rope. Heretofore, the mechanism for throwing these drums into and out. of ac-I tion was operated by hand.

An im ortant `object of my invention is to provi e an apparatus of the class described, wherein a motor in connection with lever mechanism is employed to move the drums ofthe hoisting .apparatus into and out of action, respectively, the motor being of the type which will readily stall when the drum is movedA into action.

My invention can also be used in connection with a single drum, or lmore than two drums, if found necessary.

In the accompanying drawings:

Fig. 1 is a side view of a tandem hoist illustrating my invention;

Fig. 2 is a plan view; and

Fig. 3 is an end View. I

l is the frame of the hoist. `2 and 3 are pedestals 'on which are mounted the shafts,4 and 5, respectively.' Free to turn on the shaft 4 is a drum' (i, and free to turn on the shaft 5 is a drum 7. Mounted on the shaft 4 is a gear wheel Shaving a beveled clutch' face 9 adapted to a corresponding face on the drum. On the shaft 5 is -a gear wheel 10 having-a clutch face l1 adapted to asimilar face on the drum 7. The two gears intermesh, as shown in Fig 1. The gear 10 is driven' from a pinion 12 'on a shaft 13.v On the opposite end of this shaft is a gear wheel 14 meshing with apinion l5 on the shaft 16 `of an electric motor 17,

18 are extended hearingson a line with theI shafts 4 and 5, and located in these bearings are the devices for moving the drums 6 and 7 into and out of engagement with the friction surfaces of the gear wheels 8 and 10. These devices are o v nar construction and have not been 'shown in etail.y e p v I provide a controlling mechanism for the Pennsylvania, A

. nection between the a screw and mit the ordi-.

two friction clutches which includes the two` devices already mentionedv and also levers A. COEPOEATIQN' 0F PENNSY- 19, 19 on the respective shafts 4 and These two llevers are connected by a rod 20. In the present instance, one of the levers is connected by` links 21 toa nut 22 through which extends a screw shaft 23 j ada ted tti-bearings 24 on the frame of the lmac ine.. This screw shaft is driven directi ly -by a motor 25, which lstalls when the coacting friction surfaces of the drums gear vwheels 8 and 10, respectively, are brought into engagement, as When' and 7 and the will appear more fully hereinafter. y the motor is driven in one direction, the nut 22 travels on the screw 23 and moves one drum into frictional contact with its te i gear wheel, while `it withdraws the vother drum owing to the fact that the levers are arranged so that one lever moves themech-v anism in one direction while the other lever moves the mechanism in the opposite di-` rec/tion. When the motor 25 isl reversed, the

other drum isinoved into frictional con-- gear wheel while the other tact with its is withdrawn, While I have' described the operative condrurn controlling mechanism as employing arrangement, it is apparent may be employed, as, forinstance,` bevel gear wheel or lrack and spur mechanisms, all as will be readily understood" by those skilled in the art.

driving motor and the that other forms of operative connections a The s 'eciiic arrangement hereinabove de-V scribed is capable of various changes and modifications without departing from the spirit and scope of my invention, and I desire, therefore, that only such limitations shall be im osed thereon as are indicated by the appen edcl'aims by the prior art.

I claim:

l. The combination in ay hoisting apparatus, of two hoisting drums power mechanism, means `ineu two iriction clutches for respectively Vconnecting the drums with the power mechanism, controlling mechanism connected with .the two :friction clutches and movable in opposite directions to cause the enga ement of one clutch and the release ot the'other clutch, and a reversibis motorhaving a positively acting power connection withthe said ccntrog' mech-1 or as are demanded `ada ted to stall when the said controlling mec anisni reaches its limit of movement in either direction and the motor thereb sei-ving to continue to apply force whic serves to hold the corresponding friction clutch in engagement.

. 2. The combination of two friction clutches, controlling mechanism connected with the two friction clutches and movable in opposite directions to canse the engagement of one clutch and the release of the other clutch, and a reversible motor having a positively acting power connection with the said controlling mechanism to move it in either direction as desired, tlie said motor being constructed and adapted to stall when the said controlling mechanism reaches its limit of movement in either di i'ection and the motor thereby serving to continue to apply foi-ce which serves to hold the corresponding friction clutch in engagement.

3. The combination of two friction clutches, controlling mechanism connected with the two friction clutches and movable in opposite directions to cause the engagement of one clutch and the release of the other clutch, a nut to which the said controlling mechanism is connected, a rotat able screw engaging the nut and fixed against endwise movement, and a motor hav ing a positively acting power connection with the said screw to move it in either direction as desired, the said motor being constructed and adapted to stall when the said controlling mechanism reaches .its limit of movement in either direction and the motor thereby serving to continue to apply force which serves to hold the corresponding friction clutch in engagement.

ROBERT H. BEAUMONT. 

